Nicholas Huynh Anthropology 005 Introduction to Physical Anthropology 1. A. A mutation is the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Natural selection chooses among the unfit and fit variants as they emerge from these mutations. B. These variants are transmitted to offspring through genetic recombination during meiosis. C. Mutations arise due to the fact that the cellular machinery that copies DNA sometimes makes mistakes that alter the sequence of a gene. D. Recombination creates new combinations of alleles. Alleles that arose at different times and at different places through mutations can be brought together. E. For mutations to affect an organism’s descendents, they must: 1) occur in cells that produce the next generation and 2) affect the heritability of the material.
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This note was uploaded on 11/21/2009 for the course ANTH 5 taught by Professor Gaulin during the Spring '07 term at UCSB.